101618820 has 96 divisors (see below), whose sum is σ = 317923200. Its totient is φ = 26946432.

The previous prime is 101618801. The next prime is 101618831. The reversal of 101618820 is 28816101.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122166 + ... + 122994.

It is an arithmetic number, because the mean of its divisors is an integer number (3311700).

Almost surely, 2^101618820 is an apocalyptic number.

101618820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101618820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158961600).

101618820 is an abundant number, since it is smaller than the sum of its proper divisors (216304380).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101618820 is a wasteful number, since it uses less digits than its factorization.

101618820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 101618820 is about 10080.6160526031. The cubic root of 101618820 is about 466.6501207286.

It can be divided in two parts, 10161 and 8820, that added together give a palindrome (18981).

The spelling of 101618820 in words is "one hundred one million, six hundred eighteen thousand, eight hundred twenty".